Jack



ACK

Filed June 5. 1924 I INVENTOR 7. .7!- Gooarz'nk ATTORNEYS Patented May 19, 1925.

UNITED STATES 1,538,397 PATENT OFFICE.

FREDERIC HARRISON (3001312103 or GEEZENVILLE, MICHIGAN JACK.

Application filed June 5,

in Jacks, of which the following is a speci fication.

This invention relates to jacks and is more particularly directed to a jack for shifting paper rolls. y

The invention has for-its object the provision ofa simple and inexpensive but efii cient ack for lilting the heavy rolls of paper from a press or for applying the rolls to a press. I

c A further object of the invention is the provision'of ajaclr for lifting heavy rolls or" paper having cooperating pawls operated by a single leve r for raising or lowering the jack bydifierential movements of the lever. I

'A still further object of the invention is the provision of ack which is particularly useful in handling paper rolls 'an'do'perating in conjunction with a fulcrum block braced by an end of the press wherebythe rolls are readily removed from or'replaced in a press, the jack being sode'signed that the rolls may 'e received directly on the jacks from a truck. I p a p v Other objects and advantages of the invention reside in certain novel ieatures off the construction, combination and arrangement of parts which will be hereinafter more fully "described and particularly pointed "out in the appended iclain' s, reference being had to "the accompanying drawings forming part of tliis' specification, and in which:

Figure 1 is a side view of the jackas ap plied for removing a roll from a press;

Figure "2 is afplan view of the jack;

'Figure 3 anenlarged fragmentarysec tionalfview of the controlling pawls for raising and lowerin g "the supporting rails.

Referring more particularly to the drawings, 1 andE-deSi-gnate apair of rails seeuredin spaced relation by bolts 3 and spacing sleeves and 5. The sleeve 4; audits corresponding bolt also act as a fulcruming pin to be presently explain-ed The rails are directed towards each other at' th'eir outer endswhere a rack K5 siidably i'e'c'eived and movable between saidends; The inner ends 1924-. Serial No. 713,102.

ofthe rails are curved iqawfardly; as shown at 7, to receive the shaft 8 of a paper roll 9.

A :tulcrum block 10 having a slot 11 to receive thesleeve 4 at the inner ends of the rails is adapted to abut the outer end of a press 12. The outer end of the block is cut away to 'provide a'securing flange 1.3 which is bolted at Ll to the floor of the press room. The rack 6 1S provided with a longitudinal slot 15 which receives a guide block .16 on At one side of the rack 6 and between. said rack and rail 2 is pivotal'ly mounted the horizontal portion 17 of a lever 18o'n a pin or bolt 19 fastened to the rails. The inner end "of the horizontal portion of said lever has an angularly disposed lug 20 provided with an engaging shoulder 21. This shoulder engages the rear edge of rack 6 and limits the upward movement of said lever, From the horizontal portion 17 the lever 18 is bent upwardly and adapted to be grasped by the hand opera-ting said lever, v

A pawl 221s pivoted at 23 to the horizontal portion 1'? of said lever and is adapted tie-engage the teeth of the rack 6 at certain times." A spring 24 mounted on a'pin 25 secured to the rail 2 engages a pin 26 on the pawl and tends to force the pawl ont of engagement with the teeth of the rack. The paw'l 22 has a r'earw-ardly "projecting lug 27 provided with a notch 28 engageable with the upper free end 29 ot a dowi'iwardly curved spring 30 of flat steel and which is I as will be presently explained;

A pair of wheels 36 are mounted 'on 'aX-le 237T carried by the lower 'end'of the rack for supporting said rack during operation not the ack andso provides an easy means or transportation" of said jack in the press room. 'An'enl-argement of the side or a sleeve 38 is provided to maintain "the wheels in position; a p

A rest or roll shaft support 39 projects upwardly from "between the rails 1 and 2 andis formed on the end of a bar fl-O pivoted at 41 to rail 1; A pin 42 on rail 1 limits the downward movement of the inner end of bar 40 and prevents upward or rearward movement of the rest 39. A spring 13 secured at one end to rail 1 has its other end attached to the outer end of the bar 40 and maintains the inner end of said bar in engagement with pin 42. A pin 45 connected to the rails engages the spring 30 at times during movement of the lever 18 for causing said spring to force pawl 31 into engagement with the teeth of rack 6.

The paper roll shifting jack is primarily designed to be used in connection with a Duplex. Goss Comet and similar web presses using one or two rolls of paper.

The paper roll. after being placed on the usual paper roll shaft supplied with a press is placed between two jacks constructed according to my invention with the opposite ends of the shaft resting on the rails near the jack or outer end engaging the rest 39 to prevent the roll from sliding down the ails before the rolls are released from the truck. The levers 18 are then raised to their full height by two workmen and then forced downwardly through half of theirstroke whereby the rails are elevated. This operation is repeated until the roll is free of the truck body. The truck is then shifted from the jacks and the levers 18 are then lowered and elevated through the lower portion of their strokes when the rails will descend. This operation is continued until the rail approaches a substantially horizontal position when rest 39 is depressed and the roll is revolved until it reaches the curved portions 7 of the rails and falls into the socket of the press 12 beyond the fulcrum block 10.

In removing the rolls from the press, the jack'is placed in position with the curved portions 7 of the rails in engagement with the roll shaft 8 and the fulcrum sleeves 4: in the grooves of the fulcrum blocks 10. The outer ends of the rails are lowered by oper ating the levers 18 through the lower half of their stroke. The curved ends of the rails are thus elevated, lifting the rolls from the press.

hen the lever 18 is raised to its full height and limited by the lug 20 and rack 6, pawl 22 is oscillated by the curved end 29 of spring 30 coming into contact with the notch of lug 27 carried by said pawl so that the pawl is engaged with the teeth of the rack. Downward movement of the lever through. its upper half stroke tilts the inner end of the lever upwardly raising the jack end of the rails since said lever is fulcrumed on. the rack by pawl 22. Pawl 31 swings away from the rack when the lever is lowered but is moved into engagement with a tooth in the rack by spring 30 and supports the rails during transposition of the pawl 22, Continued oscillation of lever 18 in its upper half stroke elevates the jack end of the rails.

hen lever 18 is actuated through the lower half of its stroke the lug 27 of pawl 22 is not engaged by spring 30 whereby the spring 24 will force the pawl 22 out of engagement with the teeth of the rack 6 and pawl 31 will fall into a notch in the rack and hold the rails during transposition of the pawl 22. The lower end 32 of spring 30 will move pawl 22 into engagement with the rack when pawl 31 has been set. lVhcn pawl 22 acts as a fulcrum for slightly raising the rail pawl 31 will fall out of a notch on rack 6 and engage a notch lower on the rack as the rails are lowered.

By exerting a pull on pin 35, pawl 31 released and the rails may be moved downwardly or upwardly. Spring 24- releases pawl 22 during manual operation of pawl 31.

I claim:

1. A lifting jack comprising a rack, a pair of rails slidably receiving at one end the rack, a lever pivoted to the jack end of the rails, a pawl pivoted on the lever and engaging the teeth of said rack, a pawl pivoted on the rail adjacent the rack and engageable with the teeth of the rack, a spring carried by the second pawl for causing the first pawl to engage the rack and at another time for causing the second pawl to engage said rack.

2. A lifting jack comprising a rack, a pair of rails slidably receiving at one end the rack, a lever pivoted to the jack end of the ails, a pawl pivoted on the lever and engaging the teeth of said rack. a pawl pivoted on the rail adjacent the rack and engageable with the teeth of the rack, a spring carried by the second pawl for causing the first pawl to engage the rack and at another time for causing the second pawl to engage said rack. and means in the path of said spring engaging the spring for causing the spring to force the second pawl only in engagement with the rack.

A lifting iack comprising a rack, a pair of rails slidably receiving at one end the rack, a lever pivoted to the jack end of the rails, a pawl pivoted on the lever and engaging the teeth of said rack, a pawl pivoted on the rail adjacent the rack and engageable with the teeth of the rack, a spring carried by the second pawl for causing the first pawl to engage the rack and at another time for causing the. second pawl to engage said rack, means in the path of said spring engaging the spring for causing the spring to force the second pawl only in engagement with the rack, and means for forcing the second pawl out of engagement with the rack during the forced engagement of the second pawl with said rack.

' 4. A lifting jack comprising a rack, a pair of rails slidably receiving at one end the rack, a lever pivoted to the jack end of the rails, a pawl pivoted on the lever and eugaging the teeth of said rack, a pawl pivoted on the rail adjacent the rack and engageable with the teeth of the rack, a springcarried by the second pawl for causing the first pawl to engage the rack and at another time for causing the second pawl to engage aid rack, and means on the first pawl engaged by the spring whereby said pawl is moved to an operative position with the pawl to engage the rack and at another time for causing the second pawl to-engage said rack, said spring having a-curved upper and lower portion adapted to engage the first pawl during various movements'oit the lever for actuating said pawl to an operative position with the rack.

6. A lifting jack comprising-amok, a pair of rails slidably receiving at one end the rack, a lever pivoted to the jack end of the rails, a pawl pivoted on the lever and engaging the teeth of said rack, a pawl pivoted on the rail adjacent the rack and en gageable with the teeth of the rack, a spring gaging the teeth of said rack, a pawl pivoted on the rail adjacent the rack and engageable with the teeth of the rack, a spring carried by the second pawl for causing the first pawl to engage the rack and at another time for causing the second pawl to engage said rack, a movable support carried by the railsnear the jack end for maintaining a proper roll in position adjacent the rack, said support being spring pressed to operative position and adapted to be depressed for releasing said roll.

8. A lifting jack comprising a rack, a pair of rails slidably receiving atone end the rack, a lever pivotedto the jack end of the rails, a pawl pivoted on the lever and engaging the teeth of said rack, a pawl pivoted on the rail adjacent the rack and engageable with the teeth of the rack, a spring carried by the second pawl for causing thefirst pawl to engage the rack and at another time for causing the second pawl to engage said rack, manual means connected with the second pawl for releasing the same whereby the rails may be elevated or lowered near the jack end independently of the operating pawls and lever.

9. A lifting ack comprising a rack a pair of rails slida'bly receiving at one end the rack, a lever pivoted to the jack end of the rails, a pawl pivoted onthe lever and engaging the teeth of said racln a pawl pivoted on the rail adjacent the rack and engageable with the teeth of the rack, a spring carried by the second pawl for causing the first pawl to engage the rack and at another time for causing the second pawl to engage said rack, manual means connected with the second pawl for releasing the same whereby the rails may be elevated or lowered near the jack end independently of the operating pawls and lever, and means for limiting the upward throw of the lever.

FREDERIC HARRISON GOODRlCH. 

